Bidet Fresh Water Spray Non-Electric Mechanical Bidet Toilet Seat Attachment Self-Cleaning The new non-electric fresh-water bidet spray with single nozzle is easily attachable and detachable With one fresh water connection and one nozzle, the bidet offers a hygienic and comfortable alternat There is a control knob to adjust the pressure of the water from low to high. The self-installation takes 10 to 20 minutes and does not require any special tools other than a nor T-connector Size: 3/8" - 15/16", only for US user